OpenGate

Open-Source Hosting Billing Platform

An open-source billing and client management platform for hosting companies, built with C# and .NET 10, OpenGate provides a modern, extensible alternative with Blazor Server UI and MongoDB.

Features

• Product Catalog - Create products with configurable options, billing cycles, and categories
• Client Storefront - Browse, configure, and order products with a shopping cart
• Order Management - Full lifecycle: pending, active, suspended, cancelled, terminated
• Invoicing - Auto-generated invoices with PDF export (QuestPDF)
• Payment Gateways - Stripe, PayPal, Heleket, Cryptomus, NOWPayments, and BTCPay Server integrations via extension system
• Server Provisioning - Pterodactyl, Proxmox VE, and VirtFusion integrations for automated server management
• Server Management - Customer-facing power controls (start/stop/restart), OS reinstall, and backup management
• Support Tickets - Client ticket system with priority levels and staff replies
• Admin Dashboard - Revenue stats, user management, and global settings
• Extension System - Plugin architecture for custom gateways, provisioners, and features
• Email Notifications - SMTP-based notifications for invoices, orders, and tickets

Tech Stack

Component	Technology
Runtime	.NET 10 (LTS)
Language	C# 14
Backend	ASP.NET Core 10
Frontend	Blazor Server
Database	MongoDB
Auth	ASP.NET Identity + MongoDbCore
PDF	QuestPDF 2026.2
CSS	Bootstrap 5 + Bootstrap Icons
Payments	Stripe.net 50.x, PayPal REST API v2, Heleket API, Cryptomus API, NOWPayments API, BTCPay Server Greenfield API
Provisioning	Pterodactyl Panel API, Proxmox VE API, VirtFusion API
Platform	x64 only

Project Structure

OpenGate/
  src/
    OpenGate.Domain/                  # Entities, enums, repository interfaces
    OpenGate.Application/             # DTOs, service interfaces, service implementations
    OpenGate.Infrastructure/          # MongoDB repositories, DI registration
    OpenGate.Extensions.Abstractions/ # Extension/plugin contracts
    OpenGate.Web/                     # Blazor Server app, controllers, UI
  extensions/
    OpenGate.Extensions.Stripe/       # Stripe payment gateway
    OpenGate.Extensions.PayPal/       # PayPal payment gateway
    OpenGate.Extensions.Heleket/      # Heleket crypto payment gateway
    OpenGate.Extensions.Cryptomus/    # Cryptomus crypto payment gateway
    OpenGate.Extensions.NowPayments/  # NOWPayments crypto payment gateway
    OpenGate.Extensions.BtcPayServer/ # BTCPay Server payment gateway
    OpenGate.Extensions.Pterodactyl/  # Pterodactyl server provisioner
    OpenGate.Extensions.Proxmox/      # Proxmox VE server provisioner
    OpenGate.Extensions.VirtFusion/   # VirtFusion server provisioner

Prerequisites

• .NET 10 SDK
• MongoDB (local or hosted)

Getting Started

1. Clone the repository

   git clone <repo-url>
   cd OpenGate

2. Configure MongoDB

   Edit src/OpenGate.Web/appsettings.json:

   {
     "MongoDB": {
       "ConnectionString": "mongodb://localhost:27017",
       "DatabaseName": "OpenGate"
     }
   }

3. Run the application

   dotnet run --project src/OpenGate.Web

4. Access the app

   Navigate to https://localhost:5001 (or the port shown in console output).

5. Default admin account

   • Email: admin@opengate.local
   • Password: Admin123!

Configuration

Payment Gateways

Configure payment gateways in the Admin Settings panel (/admin/settings):

Stripe:

• Secret Key
• Publishable Key
• Webhook Secret

PayPal:

• Client ID
• Client Secret
• Sandbox mode (true/false)

Heleket:

• Merchant ID (UUID)
• API Key

Cryptomus:

• Merchant ID (UUID)
• API Key

NOWPayments:

• API Key
• IPN Secret (for webhook verification)

BTCPay Server:

• Server URL (e.g. https://btcpay.example.com)
• API Key (Greenfield API)
• Store ID
• Webhook Secret

Server Provisioning

Pterodactyl:

• Panel URL
• API Key
• Default Nest/Egg/Location IDs

Proxmox VE:

• API URL (e.g. https://proxmox.example.com:8006/api2/json)
• Token ID (e.g. user@pam!tokenname)
• Token Secret
• Default Node, Storage, Template VMID
• Default Memory, Cores, Disk

VirtFusion:

• API URL (e.g. https://virtfusion.example.com/api/v1)
• API Token (Bearer token)
• Default Operating System ID
• Default Hypervisor Group ID
• Default Package ID

Email (SMTP)

Configure in Admin Settings under the "Email" group:

• SMTP Host, Port, Username, Password
• From address

API Endpoints

Endpoint	Description
GET /api/invoices/{id}/pdf	Download invoice PDF
POST /api/webhooks/{gatewayName}	Payment gateway webhooks

Customer Server Management

Active orders with a provisioned server show a Manage Server button. The server management page provides:

• Power Controls - Start, stop, and restart the server
• Reinstall OS - Wipe and reinstall with a chosen OS template (with confirmation)
• Backups - Create, list, and restore backups
• Server Info - Live status, resource usage, and provisioning details

Available at /my/orders/{orderId}/server for customers who own the order.

Extending OpenGate

Create custom extensions by implementing interfaces from OpenGate.Extensions.Abstractions:

• IPaymentGateway - Custom payment gateways
• IServerProvisioner - Custom server provisioning (power, reinstall, backups, lifecycle)
• IOpenGateExtension - Base extension interface

License

MIT